Shrimp Salad on a Croissant with White Bean Mayo

Name: Shrimp Salad on a Croissant with White Bean Mayo
Ingredients: For the white bean mayo:; 1 cup cooked, rinsed, and drained white beans (Northern or Cannellini); 2 tablespoons fresh lemon juice; 1/2 teaspoon Dijon mustard; 1/2 teaspoon salt; 1 teaspoon agave nectar; 3/4 cup vegetable or canola oil, plus more as needed; For the sandwich and assembly:; 2 cups cooked, peeled, deveined, and chopped shrimp (I used 1 pound of Key West Pinks); 1/2 cup diced celery; 1/4 cup sliced green onion; 1/4 cup minced parsley; 1/8 teaspoon cayenne pepper; 1 tablespoon minced dill; 3/4 cup white bean mayo; Salt and pepper, to taste; 4 croissants, halved